Printer&#39;s furniture



Patented Mar. 15, 1921.

amve/wto'v D. A. HAMPSON.

PRINTERS FURNITURE.

APPLICATION FILED Aue.5, 1920. 1,371,621.

r 1 1 1 I um Iliu W MWOW 2 v I DONALD A. HAMPSON, 0F MIDDLE'I'OW'N, NE'W WILCOX MFG. COMPANY, OF MIDDLETOWIT,

NEW YORK.

YORK, ASSIGNOR TO MORGANS & NEVJ YORK, A. CORPORATION OF PRINTERS FURNITURE.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed August 5, 1920. Serial No. 401,451.

To all to from it may concern Be it known that I, DONALD A. HAMPsoN, a citizen of the United States, residing at Middletown. in the county of Orange and State of New York, have invented a certain new and useful Improvement in Printers Furniture, of which the following 1s a specification.

The invention relates to job-locks in which the strong expansion required in the locking-up operation, is effected by turning a screw carried by one member of the lock and engaged by the other member, and the object of the invention is to provide geared means for turning the screw, whereby the latter is positively operated and held frictionally against reverse movement under the considerable pressure to which the lock is subjected in service.

Another important object is to inclose and protect the gearing and avoid projectmg portions on the face of the lock, and to provide means for operating the gearing by the ordinary quoin key conveniently applied and turned.

The invention consists in certain novel features and details of construction and arrangement by which the above objects are attained, to be hereinafter described and claimed.

The accompanying drawings form a part of this-specification and show an approved form of the invention.

Figure 1 is a plan or face view of the job-lock, partly in horizontal sectlon.

ig. 2 is a transverse vertical section, partly in elevation. The plane of section is indicated by the line 2+2 in Fig. 1.

Fig. 3 is a horizontal section through the head member of the lock, taken on the line 3-3 in Fig. 2, and partly in plan view.

Similar letters of reference'indicate the same parts in all the figures.

The two main portions or members of the lock are the base A and head '15; the latter having arms or studs B received in corresponding holes drilled in the posts A of the base and serving to guide the members and permit the lock to be expanded or contracted in width by moving the base and head relatively to each other while maintaining both in alinement. The outer faces of the base and head are plane and parallel and the thickness of both members at such faces is the same.

A hollow bridge A connects the posts A and receives a pair of oppositely placed pivotally mounted dogs D serving as a separable nut for a screw C carried by the head member and extending'into the bridge A between the dogs D. t

On the outer face of each dog is secured a Y-shaped leaf spring F the free end of which lies against the inner face of the adacent post A and holds its dog in yielding contact with the screw. A lug D of each dog extends below the bridge A and by pressing the lugs toward each other by the thumb and finger, the dogs are swung outwardly in opposition to the springs and the screw is thus released when desired.

The threads of the screw C are conical and the teeth on the dogs D are correspondingly shaped so that the dogs also serve as spring pawls' with the cylindrical ratchet formed by the teeth of the screw.

In the center of the head B is a recess 6 receiving a toothed wheel 0 on the screw, shown as a spiral gear wheel, and above the wheel is a reduced neck C extending through a portion of the head and through a washer C received in an opening 6 The projecting end of the neck is upset or spread to form a narrow flange above the washer and engage the latter to prevent withdrawal of the screw axially while permitting it to rotate freely.

At one side of the recess 1) is a cylindrical cavity Z1 drilled at a right angle to the recess Z) and communicating therewith at one side. The cavity receives loosely a cylindrical barrel E having spiral gear teeth E in mesh with the wheel C and having its outer face smoothly finished at the margin. The barrel is held in place in the cavity by peening the metal at the mouth the cavity over and upon the smooth outer margin of the barrel, and in the center of its'inner face is an extension E of less diameter received in a corresponding hole 5 extending from the cavity, serving as a pivotal center for the barrel.

The outer face of the barrel is recessed.

as at e, in the form of a cross to receive the usual Hempel or quoin key by which the barrel is turned and motion thus communicated through the teeth E to rotate the screw C.

In using the job-lock it is inserted be tween the matter and adjacent inner face of the chase as usual and expanded by forci bly separating the head and base members, the screw 0 and dogs D operating as a ratchet and pawls, until contact with the matter and chase is attained; theHempel key is then inserted in the recess 6 of the barrel E and the screw thus forcibly turned in the nut formed by the dogs until the desired pressure is exerted.

The friction of the spiral teeth E and wheel C is sufficient to hold the screw against backing off and the matter is thus held reliably locked-up in the chase.

It will be noted that the recess 5 b and cavity 6 b. are bored by simple drilling operations, and the barrel E and wheel C are confined by easily performed spreading or upsetting operations, thus reducingthe cost of manufacture while completely inclosing the mechanism and protecting it against dirt or injury. This manner of holding the barrel E also permits the latter to lie flush with or a little below the adjacent face of the head A.

Although the toothed wheel C and teeth E of the barrel are shown and described as spiral gears, it will be understood that the former may be a worm wheel and the latter a worm in mesh with such worm wheel; Such worm gearing is slower in operation than the spiral gearing but offers a corresponding increase in expansive pressure and offers greater resistance to reverse movement of the screw in service.

In releasing the lock the barrel E is turned in the'reverse direction by the key'to relax the strong pressure; the lugs D are then compressedbetween the finger and thumb to free the screw C from engagement, and the head and base may then be contracted easily and quickly.

By employing gearing through which the motion is transmitted angularly from a key convenientlyapplied on the upper face of the lock, the expansion is easily and rapidly effected without damage to the type-matter.

I I claim 1-- 1. A device of the character set forth,

comprising relatively movable head and base members and guiding means therefor, a screw "rot-atably mounted in said head member, means carried by said base memberifor engaging said screw, and gearing within said head member for turning said screw.. r

2. A device of the character set forth; comprising relatively movable head and base members and guiding means therefor,

a screw rotatably mounted in said head member and having a toothed wheel received gaging said, screw,

in a recess in said head member, a cavity in said head member adjacent such recess, means carried by said base: member for enand means received in such cavity and in mesh with said toothed wheel for turning said screw.

A device of the character set forth,

comprising a head member having a recess and a, cavity therein, a base member movable relativeiy to said head member, guiding means for said members, a screw rotatably .mounted in, said head member, a toothed wheel on said screw received in said recess, barrel in said cavity having teeth thereon in mesh with said wheel, and means carried by said base member for engaging said screw. 7

i. A device of the character set forth, comprising a head member having a cavity therein, a base member movable relatively to said head member, guiding means for said members, a screw rotatably mounted in said head member, a toothed wheel on said screw within sa dhead member, means carried by said base member for engaging said screw, a cylindrical barrel .rotatably mounted in such cavity, and means on said barrel for engaging said wheel to turn said screw.

5. A device of the character set forth, comprising a head member having a cavity therein, a base member movable relatively to said head member, guiding means for said members, aiscrewrotatably mounted in said head member, a toothed wheel on said screw within said head member, means carried by said base'member for engaging said screw, a cylindrical barrel rotatably mounted in such cavity, and teeth on said barrel in mesh with said wheel. I

-6. A device of the character set forth, comprising a head member having a cavity therein a base member movable relatively to said head member, guiding means for said members, a screwrotatably mounted in said head member, a toothed wheel on said screw within said head member, means carried by said base member for engaging said screw, a cylindricalbarrel' rotatably mounted in such cavity, means on said barrel for engaging said wheel to turn saidscrew, said barrel having a recess for engagement by a removable turning instrument.

In testimony that I claim the invention above set forth I my signature in presence of two witnesses.

DONALD A. HAMPSON.

Witnesses FLOYD W. MORGANS WARNER MoRGANs. 

